Example: d3 i12 e30
N is field width, X is one of the following char :
	d ->                  Num (default size =  4)
	i ->                  ID  (default size = 12)
	h ->             LastHost (default size = 16)
	l ->                Visit (default size =  5)
	p ->                 Post (default size =  5)
	n ->                 Nick (default size = 18)
	v ->       LastVisit_text (default size = 24)
	V ->        LastVisit_num (default size = 14)
	r ->                 Real (default size = 25)
	a ->                 Addr (default size = 30)
	e ->                Email (default size = 30)
	t ->                 Term (default size =  8)
	u ->            Userlevel (default size = 32)
	f ->      FirstVisit_text (default size = 24)
	F ->       FirstVisit_num (default size = 14)
	m ->             RealMail (default size = 45)
	I ->            IdentInfo (default size = 20)
